Related Experiment Videos
[Does methylmethacrylate induce cardiovascular complications during alloarthroplastic surgery of the hip joint?
Abstract:
Cardiovascular experiments in dogs and rabbits under various conditions demonstrated that monomethylacrylate has no direct cardiac depressant activity. The transient decrease in blood pressure and heart rate of patients receiving endoprostheses and experimental animals is elicited by a vagotropic effect of the methacrylates and can be antagonized by prophylactic application of atropine. Severe cardiovascular incidents involving an acute cor pulmonale are induced via the steep rise in pressure within the bone-marrow canal during the forcing in of the endoprosthetic shafts, leading to intravasation of bone marrow and its thromboplastine like compounds, thus resulting in a partial coagulation. A schedule of simple prophylactic procedures proved to be effective in preventing fatal cardiovascular complications.
Insights
Monomethylacrylate does not directly depress cardiac function. Cardiovascular events linked to endoprostheses stem from a vagotropic effect and bone marrow pressure, preventable with prophylactic measures.
Area of Science:
- Biomedical Engineering
- Cardiovascular Physiology
- Toxicology
Context:
- Endoprosthetic device implantation can lead to transient cardiovascular changes.
- The role of methacrylate compounds in these events requires clarification.
- Bone marrow pressure during implantation is a potential risk factor.
Purpose:
- To investigate the direct cardiac effects of monomethylacrylate.
- To elucidate the mechanisms behind cardiovascular incidents during endoprosthesis surgery.
- To identify effective prophylactic strategies against these complications.
Summary:
- Cardiovascular experiments in dogs and rabbits revealed monomethylacrylate lacks direct cardiac depressant activity.
- Transient decreases in blood pressure and heart rate are attributed to the vagotropic effects of methacrylates, antagonized by atropine.
- Severe events, including acute cor pulmonale, are linked to bone marrow pressure during endoprosthesis insertion, causing intravasation and coagulation.
Impact:
- Findings clarify the safety profile of monomethylacrylate in cardiovascular contexts.
- Demonstrates the efficacy of atropine in mitigating methacrylate-induced vagotropic effects.
- Highlights the importance of prophylactic procedures in preventing fatal cardiovascular complications during endoprosthesis surgery.